Thin infrared lens

摘要

A novel thin infrared lens comprising an infrared lens and a hard and thin substrate that allows infrared lights to penetrate, is disclosed. The infrared lens may be a Fresnel refraction lens, prepared as a thin film by injection or casting. The infrared lens is attached to the thin substrate to form a lens assembly. The infrared lens may be pressed or adhered to the thin substrate or enveloped by the thin substrate to form the assembly.